Improvement in force-pumps for hydraulic presses



yUNITED STATES PATENT OEEIcE.

W. P. OALLAHAN, OF DAYTON, OI-lIO.

IYMPROVEMEN'T IN FORCE-PUMPS FOR HYDRAULIC PRESSES.

Specication forming part of Letters Patent No. 79,949, dated July 14, 1868.

To a/ZZ whom it may concern:

Be it known that I, W. P. GALLAHAN, of Dayton, in the county of Montgomery and State of Ohio, have invented a new and Improved Hydrostatic Pump; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable those skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification.

This invention relates to a new and improved arrangement whereby a forcing-pump which is usedl to operate hydrostatic presses in the process of manufacturing linseed-oil and other similar operations where hydrostatic presses are used is made and arranged so as to operate upon a number of presses, thereby saving much valuable time and greatly facilitatin g and expediting the operation.

The invention consists in a series of check- Valves arranged in blocks between the pump and the presses, and in a stop-valve by which the main pump is rendered inoperative when desired, and also in the general arrangement of parts, as will hereinafter be more fully described.

Figure l represents a side elevation of the arrangement, showing the mainpump with its stop-Valve stem and-a sectional view of one of the check-valve blocks, the section being through the line a: of Fig. 2. Fig. 2 is a top or plan View of the arrangement, showing the pipes which connectthe blocks with the pumps and the tops of the check-valves therein. Fig. 3 is a detached view of the lower valve and its stem.

Similar letters of reference indicate corresponding parts. Y

A represents the waterreservoir from which the pumps are supplied.

B is a pedestal upon which the beamlever C is mounted.

D and E represent pumps with jointed con.

necting-rods attached to the lever C.

F is the main or large pump, which is also connected with the lever or beam C and in the same manner as the other two.

Gis the pipe which connects this main pump with the first block, as seen in thedrawngs.

I-I I represent the checkblocks.

In the drawings, K represents the ppewhich .connects the two blocks H and I, and L indicates the exhaust-pipe for each press.

M is the pipe which connects the small pump E with the block H, and N is the pipe which connects the small pump O with the block I.

with the blocks H and I. The water is passed through these blocks tothe presses in the ordinary way, each block being provided with a safety-valve and weighted lever, as seen at a a, beside the check-valves.

'The usual method of operating hydraulic presses in oil-mills is to have one pump for two presses, and when the pressure is thrown off of one press it isA put onto the other, thns losing the time of one press while the pump is working on the other, or (in other words) keeping one press standing idle, while b oth should be at work. By having a small pump foreach press and a large one for all I can have the use of a number of presses at the same time. By my arrangement the watertor other Huid) can be thrown from the large pump to any one of the presses under the check-valves of the other presses while the pressure is on them.

To explain the operation we will suppose that the presses are both empty and it is desired to fill the one to which the check-valve in the block H belongs. Screw down the valve P in I, leaving up the valve P in I-I. This prevents the fluid from passing from the large pump to the other press or through I. When the press to which II belongs is iilled by the main pump, that pumpis made inoperative by opening its lower` valve, and this is done by raising the stem J, while the small pump E, which is connected with this press, is still working in the ordinary way. The next press can now be filled by the large pump, (after throwing down the stem .I to put it in operation,) the iiuid passing under the valve in the block H, as that valve is now held down by the pressure, so that the water will ll the next press through the block I, and the same operation can be repeated to ill all the presses which may be so connected alternately.'

Should there be three or more presses and all but one of them filled, the large pump is made to, throw to that one and no other.

I do not confine myself to the particular' arrangement shown as regards the details, as I am aware that it may be varied Without interfering with the main feature of my invention, my object being to operate upon an y one of a series of presses by a single pump, as herein described.

Having thus described my invention, I

claim as new and desire to secure by Letters Patentl. The combination' of the pumps, as shown, With check blocks and valves arranged to operate in connection with hydraulic presses, substantially in the manner set forth.

2. The pump F, in combination with the pumps D and E, the stop-Valve J, and the check-valves P, substantially as and for the purposes described.

W. P. CALLAI'IAN.

Witnesses:

D. R. DE RUST, THOMAS DEYARMON. 

